Regardless of the signs in the parking lot, we ALWAYS ask inside before planning to stay overnight. In a number of cases, we've been told it's OK if we park in a certain area, identify our coach by make, model, type, give them a phone contact, or give them other info. We have never had a problem with anything the store asked for and have stayed in WM's all over the US and Canada. When we've asked the reasons for the signs, or the contact/identity info we've been told it's so they can remove those RV's that are loud, making a mess, or otherwise are causing problems for the stores. I have had no problems with that at all. As a matter of fact, when we had a propane leak in a Can Not Stay WM (we were just shopping), and explained our problem to the manager that we'd rather not travel with the leak, the manager told us to stay until the leak was fixed.